Fuel-deflector attachment



Jan. 6, 1931. w. E. DANIELS, SR

FUEL DEFLECTQR ATTACHMENT Filed Nov. 2, 1928 INVENTOR aizew 1 Dan 2s 6 1 data. 6,, E333.

UETED WALTER E. DANIELS, SE, OF GREEN BAY, WISCONSIN, ASSIGNOR OE ONE-THIRD TO CLARE R. DANIELS AND ONE-THIRD TO WALTER E. DANIELS, JR, BOTH GREEN BAY, WISCONSIN FUEL-DEELECTOR- ATTACHMENT Application filed November 2, 1928. Serial No. 316,755.

The invention relates to improvements in Worm feed stokers, and more especially to a fuel deflector attachment for the hoppers of worm feed stokers.

The primary object. of the invention is the provision of an attachment of this character, wherein the larger pieces or lumps of coal contained within a hopper of the stoker "are prevented from working into the feed tube of the stoker, thereby eliminating the choking or plugging of this tube and thus retarding or stopping the uniform feed of fuel to the fire box of a furnace.

Another object of the invention is the provision of an attachment of this character,

wherein the construction and positioning of the same within the hopper of the Stoker is novel, to assure the proper feeding of the coal, irrespective of the sizes of the lumps or the nature of the same, that is, if the same be frozen, as the lumps will become crushed or broken up prior to the admission of the coal to the feed screw tube of the stoker, and in this manner a uniform and accurate feeding of the fuel to the furnace will be had during the working of the stoker.

A further object of the invention is the provision of anattachment of this character, which is extremely simple in construction, readily and easily applied within the hopper of the stoker, thoroughly reliable and efiiclent in purpose and operation, strong, durable, and inexpensive to manufacture and install.

With these and other objects in view the 1nvention consists in the features of construction, combination and arrangement of parts, as will be hereinafter more fully described, illustrated in the accompanying drawing, showing the preferred embodiment of the mvention, and pointed out in the claim hereunto appended.

It is to be understood of course that changes, variations and modifications may be made in the structureas come properly within the scope of the appended claim without departing from the spirit of the lnventlon or sacrificing any of its advantages.

In the accompanying drawing:

Figure 1 is a fragmentary plan v1ew of a wormfeed Stoker showing the attachment constructed in accordance with the invention applied.

' Figure 2 1s a sectional view on the line 22 of Figure 1, looking in the direction of the arrows.

Figure 3 is a vertical longitudinal sectional elevation through the stoker.

Figure 4- is a plan view of one of the elements of the attachment.

Figure 5 is an edge elevation thereof.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing in detail, A, designates generally a portion of a worm feed stoker, which is of the conventional type, including a hopper 10, with a worm feed screw chamber 11, in its bottom, this being half circular,a feed tube 12, which is adapted to extend within the fire-box (not shown) of a furnace, as usual, and a worm feed screw 13, which extends through the tube 12, and chamber 11 in the hopper, the screw 13 being driven from any suitable motive power (not shown) at its outer end. The shaft 14, of the screw 13, issuitably journaled in the casing of the hopper 10.

Mounted within the hopper 10, directly above the screw 13, on the inner wall of said hopper next to the entrance end 15, of the feed tube 12, is the fuel deflector attachment, which comprises a plurality of members each 1 consisting of a plate 16, having a straight base portion 17, and an outwardly disposed angular portion. 18, the latter being adapted to coincide with and overhang the screw 13, while the base portion 17,'is bolted or otherwise fastened to the inner wall of the hopper 10, the fasteners being preferably bolts 19, as shown in Figures 1, 2 and 3, of the drawmg.

lhese members when in position are spaced apart and located to the left of the centerline or towards the direction of rotation side of the hopper 10, so as to hold large pieces of coal within the latter just above the screw 13, whereby the lattercan crush the coal being too large to pass between the screw and the tube wall '12 gathered at the entrance 15, of said tube. Without these members within the hopper 10, the larger lumps of coal being too large to pass between the worm screw 13, and the tube wall 12, gather at the entrance 15, and the action of the screw 13 slides the larger lump up the face of the side of the hopper 10, and prevents the coal from entering the tube 12, which causes a plug or choke in the feeding operation of the stoker. 1

Frozen coal also causes the same trouble in the stoker as will larger lumps of coal.

The members of the attachment serve in their construction and arrangement in the hopper to deflect the lumps of coal so that the screw 13, will crush the coal into small enough pieces to properly feed into the tube 12, thence into the fire-box of the furnace. By the use of the attachment the coal is prevented from sliding up the walls of the hopper 10, and is crushed by the screw 13, against the chamber for the latter in said hopper.

What is claimed is:

The combination with a stoker having a hopper having a feed tube and worm screw of a pitch to direct fuel through the tube, of spaced members located within the hopper next to the tube and directly above the screw, each member including a base portion and an ear portion, the latter being in overhanging relation to the screw and directed away from said tube, the base portion being fastened to the rear or inner wall of the hopper.

In testimony whereof I aflix my si 'nature.

WALTER E. DANIEL, SR. 

